Bluelab Guardian Monitor for Continuous pH, EC and Temperature

Enhance your plant growing experience with the advanced monitoring capabilities of the Bluelab Guardian Monitor, designed to provide continuous and precise measurements of pH, EC, and temperature. This reliable monitor is a valuable addition to your gardening toolkit, ensuring optimal growing conditions for your plants.

Features and Benefits

  • 24/7 monitoring: Continuous tracking of pH, EC, and temperature for accurate measurements and optimal plant health.
  • Large, backlit display: Easily view all essential information at a glance with the monitor's bright LED screen.
  • Alarms: Set high and low alarms to alert you when parameters are out of the desired range, ensuring quick adjustments for optimal plant growth.
  • Easy calibration: Effortlessly perform pH calibration with on-screen instructions to maintain accurate measurements.
  • Flexible mounting options: Choose from wall, post, or rack mounting for convenient viewing and access.

How to Use

  1. Set up the Bluelab Guardian Monitor in a suitable location near your reservoir or growing system.
  2. Connect the pH and EC probes to the monitor, ensuring the probe cables are securely attached.
  3. Place the probes in your reservoir or growing system, allowing the monitor to continuously track your parameters.
  4. Calibrate the pH probe regularly for consistent and accurate measurements, following the on-screen instructions.

Aqua Gardening Suggests These are Best For

The Bluelab Guardian Monitor is ideal for both hobbyist and commercial growers looking for a reliable and efficient solution to track and maintain optimal pH, EC, and temperature levels in their reservoirs or growing systems. It is suitable for hydroponic, aquaponic, and soil-based growing environments.

Notes from Aqua Gardening

  • A two-year guarantee is provided for the Bluelab Guardian Monitor, and a six-month guarantee for the Bluelab pH Probe (proof of purchase is required).
  • Calibration of the conductivity and temperature measurements is not required, but regular pH probe calibration is necessary for accurate readings.
  • To maintain your Bluelab Guardian Monitor and probes, it is recommended to purchase a Bluelab Probe Care Kit for cleaning, maintenance, and calibration.


How does the Bluelab Guardian Monitor work?

The Bluelab Guardian Monitor continuously monitors the key parameters of pH, EC, and temperature in your reservoir, displaying the information on a large, backlit LED display. There's no need for manual measurements, allowing you to focus on adjusting pH and nutrients.

Are there any alarms built into the Bluelab Guardian Monitor?

Yes, the Bluelab Guardian Monitor features high and low alarms that alert you when any of the monitored parameters are outside your preferred range.

How often should I calibrate the pH probe on the Bluelab Guardian Monitor?

It is recommended to calibrate the monitor's pH probe on a regular basis. To clean, maintain, and calibrate your probes, consider purchasing a Bluelab Probe Care Kit.

Is the Bluelab Guardian Monitor water-resistant?

Yes, the Bluelab Guardian Monitor is built in New Zealand to withstand the everyday splashes that occur during the growing process.

Can I check my plant parameters remotely with the Bluelab Guardian Monitor?

To access your plant parameters remotely, consider upgrading to the Bluelab Guardian Monitor Connect. This advanced version allows you to stay connected and receive real-time notifications with the help of the free Connect software.

What is the warranty on the Bluelab Guardian Monitor and pH probe?

The Bluelab Guardian Monitor comes with a two-year guarantee, while the Bluelab pH Probe has a six-month guarantee. Proof of purchase is required to avail of the warranties.

Does the Bluelab Guardian Monitor have any mounting options?

Yes, the Bluelab Guardian Monitor offers flexible mounting options for walls, posts, and racks, allowing for optimal positioning and viewing.

Is there any difference between the Bluelab Guardian Monitor and the Bluelab Guardian Monitor Connect?

The main difference between the two versions is that the Bluelab Guardian Monitor Connect allows remote access to your plant parameters through the free Connect software, providing real-time alarms and notifications.

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Product Manual

View PDF brochure for Bluelab Guardian Monitor for Continuous pH, EC and Temperature

(SKU: 124308)

24/7 monitoring of pH, EC and temperature, 24/7 continuous monitoring of pH, EC and temperature in reservoirs, Large, backlit display for at-a-glance viewing, High and low alarms to alert you when parameters are out of range, Easy pH calibration function with on-screen instructions, 2-metre cable lengths for best positioning and viewing, Flexible mounting options for walls, posts and racks, Easy-to-clean display built for clean environments

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